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首页> 外文期刊>Applied optics >Plane gratings for high-resolution grazing-incidence monochromators: holographic grating versus mechanically ruled varied-line-spacing grating
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Plane gratings for high-resolution grazing-incidence monochromators: holographic grating versus mechanically ruled varied-line-spacing grating

机译：用于高分辨率掠入射单色仪的平面光栅：全息光栅与机械刻线变化行距光栅

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Comparative studies have been made on the holographic plane grating and the ruled varied-line-spacing (VLS) plane grating designed for two kinds of objective Monk-Gillieson type high-resolution grazing incidence monochromator, I and II. The ray-traced performance of monochromator types I and II on a synchrotron radiation beam line was evaluated in terms of resolving power and spectral purity by the introduction of new concepts of effective Gaussian line and purity profiles. The resolving power defined on the basis of the effective Gaussian profile is consistent with the spectral purity of the beam emerging from the exit slit and is more realistic as compared with those defined in the conventional manner, especially when spectral images have asymmetric profiles. It is concluded that holographic plane gratings recorded with a spherical and an aspheric wave front are capable of providing high resolution with. high spectral purity and are fully interchangeable with the corresponding ruled VLS plane gratings. This interchangeability provides more flexibility for users in choosing a proper grating for a high resolution grazing incidence monochromator of the Monk-Gillieson type. (C) 1997 Optical Society of America.
机译：对全息平面光栅和专为两种物镜Monk-Gillieson型高分辨率掠入射单色仪（I和II）设计的规则线宽（VLS）平面光栅进行了比较研究。通过引入有效的高斯谱线和纯度曲线的新概念，在分辨力和光谱纯度方面评估了I型和II型单色仪在同步加速器辐射光束线上的射线追踪性能。基于有效高斯分布定义的分辨能力与从出射缝隙出射的光束的光谱纯度相一致，并且与以常规方式定义的分辨力相比更现实，尤其是当光谱图像具有不对称分布时。结论是，记录有球形和非球形波前的全息平面光栅能够提供高分辨率。高光谱纯度，可与相应的直纹VLS平面光栅完全互换。这种互换性为用户提供了更大的灵活性，可以为Monk-Gillieson类型的高分辨率掠入射单色仪选择合适的光栅。 （C）1997年美国眼镜学会。

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